罗果夫斯基线圈测量高电压及电力系统中的暂态电流  

Measurement of transient current in high-voltage and power system using Rogowski coil

作　　者：张涛[1] 李澎[1] 罗承沐[1] 贺向前 许明圣 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084 [2]平顶山天鹰机械动力有限公司,河南平顶山467001

出　　处：《电工电能新技术》2002年第3期53-56,共4页Advanced Technology of Electrical Engineering and Energy

摘　　要：分析了罗果夫斯基线圈工作原理 ,推导出副边电流和输出电压的通用表达式 ,并结合几种被测电流波形分析了线圈特性及测量误差。正弦衰减电流的测量中 ,在典型的放电电流周期T、电流衰减系数α、线圈结构参数 β的范围内 ,计算得出频率f越低 ,α、β越大 ,相对误差δ越大的结论 ;得到了当放电回路频率f固定的情况下 ,相对误差δ主要由参数 β决定的结论。最后对电力系统暂态短路电流的测量进行了分析 ,针对内积分电路做了误差分析 ,并结合具体试验提出了采用外积分电路的必要性。On the basis of electromagnetic induction theory, the general expressions of the current and voltage in secondary winding of Rogowski coil are deduced. The characteristics and the measurement error of the coil are analyzed for several current waveforms. In the measurement of the current with attenuating sine waveform, the relative amplitude error δ is calculated over a given range of period T, attenuation coefficient α and coil's construction parameter β=R/L. It is revealed that the higher error appears in the region of lower frequency f, higher α and higher β values. Finally, the application of Rogowski coil to measure transient current in power system is discussed.

关 键 词：罗果夫斯基线圈 测量 高电压 电力系统 暂态电流 

分 类 号：TM713[电气工程—电力系统及自动化]